记忆方法
1. so called because they involve the square of x.
2. 由正方形面积所表示的平方而引申出的这个含义。
2. 由正方形面积所表示的平方而引申出的这个含义。
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词族 · quadratic
词形变化
中文词源
quadratic 四倍的，平方的
quadr-,四，-atic,形容词后缀。用于数学名词平方。
英语词源
- quadratic (adj.)
- 1650s, "square," with -ic + obsolete quadrate "a square; a group of four things" (late 14c.), from Latin quadratum, noun use of neuter adjective quadratus "square, squared," past participle of quadrare "to square, set in order, complete" (see quadrant). Quadratic equations (1660s) so called because they involve the square of x.
权威例句
- 1. Every function whose derivative is linear is a quadratic function.
- 任意一个导数为线性函数的函数都是二次函数.
- 2. This is usually a much stronger requirement than quadratic integrability.
- 这通常是一个比平方可积更强的要求.
- 3. The quadratic aperture of the cat's - eye diaphragm is imaged too large.
- 猫眼光栏的方形光孔成象太大.
- 4. Some quadratic equations have no real roots.
- 某些二次方程没有实数根.
- 5. Their difference is a quadratic residue of 17.
- 它们的差是17的平方剩余.